For my girl
In the Brooder
I raise mine on wire outside as soon as they are out of the brooder. I would occasionally have problems with flies - until I realized mine were all coming from the wasted food. I haven't had flies since I put my feeders into plastic pans/bins to catch the spill waste. That and I stopped washing down the area. Fly larvae need food and a moist environment, and I had been giving them both.